Lega Serie A president Gaetano Micciche announced on Tuesday he was stepping down from his position amid a probe into his election in March 2018.
Genoa owner Enrico Preziosi's claims that there had been irregularities concerning Micciche's election prompted an Italian Football Federation (FIGC) investigation.
"I wish to announce my immediate resignation as president of Lega Serie A," Micciche said in a statement.
"The disclosures published today and related to the closure of the investigation on my appointment 20 months ago and its possible outcome are unacceptable and required me to take this decision."
The investigation was opened following statements made by Preziosi, who had said "when things are not done properly, the truth eventually erupts."